/**
* @file
* @author Daniel Blazevic <daniel.blazevic@gmail.com>
* @date 2013
* @brief Send Write Property Multiple request
*
* @section LICENSE
*
* Copyright (C) 2013 Daniel Blazevic <daniel.blazevic@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stddef.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include "config.h"
#include "txbuf.h"
#include "bacdef.h"
#include "bacdcode.h"
#include "address.h"
#include "tsm.h"
#include "npdu.h"
#include "apdu.h"
#include "device.h"
#include "datalink.h"
#include "dcc.h"
#include "wpm.h"
/* some demo stuff needed */
#include "handlers.h"
#include "sbuf.h"
#include "client.h"

/** @file s_wpm.c  Send Write Property Multiple request. */

/** Sends a Write Property Multiple request.
 * @param device_id [in] ID of the destination device
 * @param write_access_data [in] Ptr to structure with the linked list of
 *        objects and properties to be written.
 * @return invoke id of outgoing message, or 0 if device is not bound or no tsm available
 */
uint8_t Send_Write_Property_Multiple_Request_Data(
	uint32_t device_id,
	BACNET_WRITE_ACCESS_DATA * write_access_data)
{
	BACNET_ADDRESS dest;
	BACNET_ADDRESS my_address;
	unsigned max_apdu = 0;
	uint8_t invoke_id = 0;
	bool status = false;
	int len = 0;
	int pdu_len = 0;
	int bytes_sent = 0;
	BACNET_NPDU_DATA npdu_data;

    /* if we are forbidden to send, don't send! */
    	if (!dcc_communication_enabled())
 		return 0;

	/* is the device bound? */
	status = address_get_by_device(device_id, &max_apdu, &dest);
	/* is there a tsm available? */
	if (status)
		invoke_id = tsm_next_free_invokeID();
	if (invoke_id) {
		/* encode the NPDU portion of the packet */
		datalink_get_my_address(&my_address);
		npdu_encode_npdu_data(&npdu_data, true, MESSAGE_PRIORITY_NORMAL);
		pdu_len =
			npdu_encode_pdu(&Handler_Transmit_Buffer[0], &dest, &my_address,
			&npdu_data);

		len = wpm_encode_apdu(&Handler_Transmit_Buffer[pdu_len], max_apdu,
			invoke_id, write_access_data);

		pdu_len += len;

		/* will it fit in the sender?
		note: if there is a bottleneck router in between
		us and the destination, we won't know unless
		we have a way to check for that and update the
		max_apdu in the address binding table. */
		if ((unsigned) pdu_len < max_apdu) {
			tsm_set_confirmed_unsegmented_transaction(invoke_id, &dest,
				&npdu_data, &Handler_Transmit_Buffer[0], (uint16_t) pdu_len);
			bytes_sent =
				datalink_send_pdu(&dest, &npdu_data,
				&Handler_Transmit_Buffer[0], pdu_len);
#if PRINT_ENABLED
			if (bytes_sent <= 0)
				fprintf(stderr, "Failed to Send WriteProperty Request (%s)!\n",
				strerror(errno));
#endif
		} else {
			tsm_free_invoke_id(invoke_id);
			invoke_id = 0;
#if PRINT_ENABLED
			fprintf(stderr,
				"Failed to Send WriteProperty Request "
				"(exceeds destination maximum APDU)!\n");
#endif
		}
	}

	return invoke_id;
}
